i have my front plate mounted on this tow hook bracket and have the plate in my trunk. not sure if it will work but in the event i get pulled over i am just going to say i just ran my car through a carwash and forgot to re-attach it. i have 10k miles in nj and ny and no issues.http://www.gominigo.com/NHLPB-main.html
here is the tow hook bracket maker....